Bronchitis

I have chronic bronchitis. So summer is more difficult for me. When I turn on the air conditioner because it's hot, I immediately start coughing and produce phlegm, which makes it hard. Also, when COVID was severe, I was careful about people smoking, but now they smoke casually on the street. The cigarette smoke is really hard on my bronchi. I feel like I could live without even smelling cigarette smoke, but what should I do?